|Publication number||US7853968 B2|
|Application number||US 10/725,743|
|Publication date||Dec 14, 2010|
|Filing date||Dec 2, 2003|
|Priority date||Dec 2, 2003|
|Also published as||US20050120367|
|Publication number||10725743, 725743, US 7853968 B2, US 7853968B2, US-B2-7853968, US7853968 B2, US7853968B2|
|Inventors||Elliot N. Linzer|
|Original Assignee||Lsi Corporation|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (16), Classifications (8), Legal Events (6)|
|External Links: USPTO, USPTO Assignment, Espacenet|
The present application may relate to co-pending application Ser. No. 10/713,441, filed Nov. 14, 2003, which is hereby incorporated by reference in its entirety.
The present invention relates to video generally and, more particularly, to a commercial detection suppressor with inactive video modification.
Conventional video recording devices, such as video cassette recorders (VCRs), recordable DVD drives, and hard-disk based recorders, often contain a feature to detect commercial advertisements. A user often has the option to skip the detected commercials when playing back a recording.
Conventional approaches used to determine what is or is not a commercial look at characteristics of the video sequences to classify the material as being part of a main program or as being part of a commercial. Conventional methods include using average DC values or motion vectors to determine transitions between the program and the commercials.
While a viewer may wish to use a device that can allow him to watch a program without also viewing the commercial advertisements, a broadcaster has a vested interest in seeing that the commercial advertisements are viewed.
It would be desirable to implement a commercial detection suppressor that modifies an inactive portion of a video signal to deter commercial detection.
The present invention concerns a method for processing a video signal, comprising the steps of (A) receiving the video signal comprising (i) a first segment having a series of frames each having a first region and a second region defining a first signature and (ii) a second segment having a series of frames each having a first region and a second region defining a second signature, (B) modifying each of the frames of the first segment from the first signature to a third signature and (C) modifying each of the frames of the second segment from the second signature to a fourth signature.
The objects, features and advantages of the present invention include providing a commercial detection suppressor with inactive video modification that may (i) encode programs and commercial advertisements to reduce the ability of a commercial detection device to detect the commercials, and/or (ii) obscure the start of active video in at least one frame in the sequence.
These and other objects, features and advantages of the present invention will be apparent from the following detailed description and the appended claims and drawings in which:
The present invention may be used to process a video signal to intentionally obscure where a truly active video region starts. The modification to the video signal may prevent the detection of different segments based on the start of the truly active video.
In a CCIR signal, the active portion 102 and the transition portion 106 (which may be referred to as the nominally active region) is 720 pixels wide×483 pixels high. The active portion 102 of the video signal is in a somewhat smaller region (e.g., 700×475). Typically, up to 12 columns on the left and/or right side and up to 3-4 lines on the top and/or bottom may be black.
In one example, a video signal comprising 300 frames. The frames 1-100 may be segment containing program material having a signature of [7, 5, 3, 11]. The frames 101-200 may be a segment containing commercial material having a signature of [8, 2, 0, 4]. The frames 201-300 may be a segment containing program material having a signature of [7, 5, 2, 8]. The present invention may convert the signature for particular groups (e.g., G1-Gn) of frames. For example, each of the groups G1-Gn may comprise N frames. If N=50, then the process of the present invention may generate the following signature:
G2, frames 51-100 may have a signature of [12, 8, 0, 0].
G3, frames 100-150 may have a signature of [0, 7, 2, 8].
G4, frames 151-200 may have a signature of [8, 2, 2, 4].
G5, frames 201-250 may have a signature of [7, 2, 8, 5].
G6, frames 251-300 may have a signature of [6, 1, 7, 4].
In such an example, the signatures of each of the groups G1-G6 are different and do not repeat. Since none of the signatures repeat, the nature of the commercial material is hidden from potential commercial detection systems. The signature of each of the subsequent groups (e.g., G7-Gn) may repeat the pattern of the signatures of the groups G1-G5. By selecting a particular number of the groups G1-Gn to repeat, additional protection against commercial detection may result. In particular, if the group G7 has the same signature as the group G1, and the group G7 is commercial material, while the group G1 is program material, a commercial detection circuit would not be able to detect the commercial.
The present invention may be used to fool detection devices. The present invention may be useful in broadcast equipment. For example, preventing competitors from defeating a commercial detection system, such as described in the cited co-pending application, may provide a strategic advantage.
While the invention has been particularly shown and described with reference to the preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made without departing from the spirit and scope of the invention.
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|JPH11136634A||Title not available|
|International Classification||H04N7/16, H04N5/76|
|Cooperative Classification||H04N21/454, H04N7/01, H04N5/76|
|European Classification||H04N5/76, H04N21/454|
|Dec 2, 2003||AS||Assignment|
Owner name: LSI LOGIC CORPORATION, CALIFORNIA
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:LINZER, ELLIOT N.;REEL/FRAME:014759/0826
Effective date: 20031201
|Feb 19, 2008||AS||Assignment|
Owner name: LSI CORPORATION,CALIFORNIA
Free format text: MERGER;ASSIGNOR:LSI SUBSIDIARY CORP.;REEL/FRAME:020548/0977
Effective date: 20070404
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Effective date: 20140506
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|Jun 6, 2014||AS||Assignment|
Owner name: LSI CORPORATION, CALIFORNIA
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|Apr 3, 2015||AS||Assignment|
Owner name: AVAGO TECHNOLOGIES GENERAL IP (SINGAPORE) PTE. LTD
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:LSI CORPORATION;REEL/FRAME:035390/0388
Effective date: 20140814